Merge pull request #57 from JeroenBoersma/master

Merge with JeroenBoersma as of 2013-09-16 (3 Fixes)
Merge pull request #58 from apmuthu/master

TB_PREFIX fixes and UI link and sql fixes
Merge pull request #59 from apmuthu/master

MSIE fix for Not a Number issue in jquery-1.2.6.min.js in line 23 char 1...
Merge pull request #60 from apmuthu/master

ACL for Product Attribute and Product Value included
clean up install sql data for product attributes
Update readme.md
Update readme.md
Merge pull request #3 from simpleinvoices/master

Merge with Parent